稀土对Zn-5Al合金超塑性的影响

Effects of Rare-Earth Elements on Superplasticity of Zn-5Al Alloy

在Zn－5％Al合金中添加适量稀土元素，可形成Al2CeZn2，CeZn3等化合物，提高合金的超塑变形速率和伸长率。加入过量的稀土则对超塑性能有不利的影响。

Adding suitable rare-earth elements in the Zn-5Al alloy,the chemical compound of Al_2CeZn_2 andCeZn_3, will be formed,and the speed of superplasticity de formation and elongation of alloy will be increased. But,it is disadventagous to the superplasticity,if the amount of rare-earth elements added to the alloy is excessive.